6. I'm not suggesting this thing *causes* violence.

However, we're talking specifically about an app sold via the Apple store- the Apple store, mind you, normally being a veritable paradise for culture crisis hand-wringers; for instance, no porn apps.

Also, there's nothing in the post you linked about "the genders being reversed". Yes, there are violent videogames -where violence is expressed against all sorts of people- but I'm not aware of any -much less any apps- that are specifically about a man "training" his girlfriend through domestic violence.